The utility model, which belongs to the single-chip microcomputer application field, provides a single-chip microcomputer development device mainly comprising a single-chip microcomputer main board monitoring component, a cold boot power supply switch, a USB interface, a main board work indication lamp, a single-chip microcomputer selection flat pulling switch, a crystal oscillator selection jumper, a single-chip microcomputer experiment seat, and a main board interface. The device has the advantages that the main board interface mode is flexible, construction and debugging of various control electronic circuits can be carried out conveniently; and the device can be used conveniently.