The utility model discloses an apply paint instrument with a brush, including brush head, brush head -clamp board, handle, chock plug, the brush head is installed in brush head -clamp inboard, brush head -clamp board is fixed on the upper portion of handle through the activity buckle, and the outside of brush head is equipped with the paint baffle, and the paint baffle is fixed on the top of handle, forms the fluid hold up tank, handle inside is hollow fluid apotheca, brush head -clamp board be equipped with with the communicating a plurality of fluid access holes of fluid apotheca, the bottom and the chock plug threaded connection of handle, the chock plug inboard is equipped with the through -hole needle. The utility model discloses simple structure, the cost is with low costs, can effectively avoid the coating water clock to cause unnecessary dirty, and it is extravagant to reduce coating, and brush cephalad stock solution of lower time room liquid is automatic to flow to the brush head, can improve and apply paint work efficiency with a brush.