The utility model relates to a detection device for an II-type collector. The device comprises a main control MCU, a shell, a support, a display module, a key selection module, a 485 test module, an infrared test module, a carrier transparent transmission test module and a complete machine power consumption test module, the shell comprises a first installation part and a second installation part,and the support is installed on the shell through the first installation part; the device has the advantages that the device is simple in structure; a master control MCU, a 485 test module, a carriertransparent transmission test module and a complete machine power consumption test module are installed on a support. The first mounting part is mounted on the shell; the display module, the key selection module and the infrared test module are mounted on the shell through the second mounting part; the main control MCU, the display module, the key selection module, the 485 test module, the infrared test module, the carrier transparent transmission test module and the complete machine power consumption test module are integrated on the same shell in a unified mode, the size of the whole deviceis optimized, and maintainers can conveniently carry the device to the site for detection.