<SEC-DOCUMENT>0001193125-23-227188-index.html : 20230901
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<ACCEPTANCE-DATETIME>20230901110532
ACCESSION NUMBER:		0001193125-23-227188
CONFORMED SUBMISSION TYPE:	N-CSRS
PUBLIC DOCUMENT COUNT:		17
CONFORMED PERIOD OF REPORT:	20230630
FILED AS OF DATE:		20230901
DATE AS OF CHANGE:		20230901
EFFECTIVENESS DATE:		20230901

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLACKROCK CORE BOND TRUST
		CENTRAL INDEX KEY:			0001160864
		IRS NUMBER:				522346891
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		N-CSRS
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-10543
		FILM NUMBER:		231231194

	BUSINESS ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		STREET 2:		MUTUAL FUND DEPARTMENT
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809
		BUSINESS PHONE:		888-825-2257

	MAIL ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		STREET 2:		MUTUAL FUND DEPARTMENT
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-CSRS
<SEQUENCE>1
<FILENAME>d496923dncsrs.htm
<DESCRIPTION>BLACKROCK CORE BOND TRUST
<TEXT>
Document 1 - file: d496923dncsrs.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>2
<FILENAME>d496923dex99cert.htm
<DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 302
<TEXT>
Document 2 - file: d496923dex99cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906CERT
<SEQUENCE>3
<FILENAME>d496923dex99906cert.htm
<DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 906
<TEXT>
Document 3 - file: d496923dex99906cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.SECTION19
<SEQUENCE>4
<FILENAME>d496923dex99section19.htm
<DESCRIPTION>SECTION 19 NOTICES
<TEXT>
Document 4 - file: d496923dex99section19.htm

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<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>5
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<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
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<TYPE>GRAPHIC
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<FILENAME>g496923dsp004a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g496923dsp004a.jpg

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<FILENAME>g496923dsp004b.jpg
<DESCRIPTION>GRAPHIC
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Document 7 - file: g496923dsp004b.jpg

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<FILENAME>g496923g42l24.jpg
<DESCRIPTION>GRAPHIC
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Document 8 - file: g496923g42l24.jpg

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<TEXT>
Document 9 - file: g496923leaf.jpg

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<TYPE>XML
<SEQUENCE>10
<FILENAME>R1.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 10 - file: R1.htm

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<TYPE>XML
<SEQUENCE>11
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<TEXT>
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Document 11 - RAW XML: d496923dncsrs_htm.xml

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<TYPE>EXCEL
<SEQUENCE>12
<FILENAME>Financial_Report.xlsx
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<TEXT>
Document 12 - file: Financial_Report.xlsx

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<TYPE>XML
<SEQUENCE>13
<FILENAME>Show.js
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 13 - file: Show.js

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<DOCUMENT>
<TYPE>XML
<SEQUENCE>14
<FILENAME>report.css
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 14 - file: report.css

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>15
<FILENAME>FilingSummary.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 15 - file: FilingSummary.html

Document 15 - RAW XML: FilingSummary.xml

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<DOCUMENT>
<TYPE>JSON
<SEQUENCE>18
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 18 - file: MetaLinks.json

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<DOCUMENT>
<TYPE>ZIP
<SEQUENCE>19
<FILENAME>0001193125-23-227188-xbrl.zip
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Document 19 - file: 0001193125-23-227188-xbrl.zip

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