A cable protective housing, comprising two housings (10a, 10b), wherein the two housings (10a, 10b) are detachably fastened and connected; each housing (10a, 10b) comprises a first groove (12a, 12b) and a second groove (13a, 13b) that communicates with the first groove (12a, 12b), and one end that is of the first groove (12a, 12b) and that is away from the second groove (13a, 13b) is provided with a limiting bulge (101, 102) configured to be clamped into a cable; and when the two housings (10a, 10b) are fastened and connected, the two first grooves (12a, 12b) enclose a first accommodation cavity configured to accommodate a cable connector, the limiting bulge (101, 102) is configured to limit axial sliding of the cable connector and the first accommodation cavity, and the two second grooves (13a, 13b) enclose a second accommodation cavity that accommodates a cable installation head, wherein the two housings (10a, 10b) are detachably fastened and connected through fitting between buckles and clamping slots, wherein each housing (10a, 10b) comprises a first housing structure (18a, 18b) and a second housing structure connected to the first housing structures (18a, 18b), the first groove (12a, 12b) is disposed inside the first housing structure (18a, 18b), and the second groove (13a, 13b) is disposed inside the second housing structure (17a, 17b), whereas a cross-sectional size of the second housing structure is greater than a cross-sectional size of the first housing structure, wherein each first housing structure (18a, 18b) is provided with a surrounding edge structure (16a, 16b, 19a, 19b), whereby a first surrounding edge structure and a second surrounding edge structures are disposed on two sides of the first housing structure and an other first surrounding edge structure and an other second surrounding edge structures are disposed on two sides of the other first housing structure; and when the two housings (10a, 10b) are detachably fastened and connected by using the buckles and the clamping slots, the buckles and the clamping slots are respectively and correspondingly disposed on the surrounding edge structures (16a, 16b, 19a, 19b) of the two first housing structures (18a, 18b). wherein the two housings (10a, 10b) are detachably fastened and connected; each housing (10a, 10b) comprises a first groove (12a, 12b) and a second groove (13a, 13b) that communicates with the first groove (12a, 12b), and one end that is of the first groove (12a, 12b) and that is away from the second groove (13a, 13b) is provided with a limiting bulge (101, 102) configured to be clamped into a cable; and when the two housings (10a, 10b) are fastened and connected, the two first grooves (12a, 12b) enclose a first accommodation cavity configured to accommodate a cable connector, the limiting bulge (101, 102) is configured to limit axial sliding of the cable connector and the first accommodation cavity, and the two second grooves (13a, 13b) enclose a second accommodation cavity that accommodates a cable installation head, wherein the two housings (10a, 10b) are detachably fastened and connected through fitting between buckles and clamping slots, wherein each housing (10a, 10b) comprises a first housing structure (18a, 18b) and a second housing structure connected to the first housing structures (18a, 18b), the first groove (12a, 12b) is disposed inside the first housing structure (18a, 18b), and the second groove (13a, 13b) is disposed inside the second housing structure (17a, 17b), whereas a cross-sectional size of the second housing structure is greater than a cross-sectional size of the first housing structure, wherein each first housing structure (18a, 18b) is provided with a surrounding edge structure (16a, 16b, 19a, 19b), whereby a first surrounding edge structure and a second surrounding edge structures are disposed on two sides of the first housing structure and an other first surrounding edge structure and an other second surrounding edge structures are disposed on two sides of the other first housing structure; and when the two housings (10a, 10b) are detachably fastened and connected by using the buckles and the clamping slots, the buckles and the clamping slots are respectively and correspondingly disposed on the surrounding edge structures (16a, 16b, 19a, 19b) of the two first housing structures (18a, 18b).