The invention discloses a solid chemical micro-thruster and belongs to the field of micro-propulsion technology and MEMS (micro-electro mechanical systems). The micro-thruster is formed by bonding of a silicon wafer and heat resistant glass, surfaces 2 of an upper silicon wafer 1 concave inward to form a combustion chamber 4 and a nozzle 3, a throat at a communication position of the combustion chamber 4 and the nozzle 3 is an arc with the curvature radius R, and a lower glass sheet 7 is formed by the heat resistant glass 8 and an ignition circuit structure on the heat resistant glass 8. The solid chemical micro-thruster has the advantages that ignition grooves are in the form of straight lines, and accordingly difficulty of silicon glass bonding is lowered by the aid of the straight line type ignition grooves under the conditions of the same ignition groove width and bonding area; the throat is the arc with certain curvature radius and is tangent to a boundary of a gas inlet and a gas outlet, so that a gas boundary layer is reduced while thrust of a device is enhanced; and the contact area of an igniter designed by a plurality of resistors in parallel connection and a propellant is increased, a heating area is enlarged, function failure of the whole device caused by fusing of one igniter is avoided, and reliability of the igniter is improved.