The invention provides a packaging structure and a manufacturing method for a redistribution leading wire layer. The method includes following steps: S1, a carrier is provided, a 
viscose layer is formed on the surface of the carrier; S2, at least a 
chip is pasted on the 
viscose layer, wherein the front surface of the 
chip is upwardly arranged; S3, a 
plastic packaging layer covering the 
chip is formed on the surface of the carrier; S4, a plurality of through holes corresponding to electric lead-out of the chips are formed in the 
plastic packaging layer by employing a 
laser etching method; and S5, 
metal is deposited in the through holes and on the surface of the 
plastic packaging layer, and the redistribution leading wire layer is obtained. According to the packaging structure and the manufacturing method, the 
laser etching method is employed to replace steps of photoetching and 
etching of the through holes and 
metal lines, the 
process complexity is greatly reduced, the front surface of the chip is exposed and a 
passivation layer is deposited without the planarization step or the stripping of the 
viscose layer, the redistribution leading wire layer is manufactured directly based on the plastic packaging layer, materials are saved, the method is more 
environmentally friendly, and the risk of the damage to the front surface of the chip in the process of planarization or stripping the viscose layer can be avoided.