A manufacturing method of a protective pad for sportswear comprising a plurality of separate paddings and each of the paddings comprising two layers, the manufacturing method comprising the following steps: Step 1: using spongy materials to make the paddings, comprising the following steps: deciding a thickness of each layer of each padding; choosing the spongy materials for each layer, wherein the spongy materials chosen for each layer have a thickness corresponding to the thickness decided for the corresponding layer; cutting the spongy materials chosen for each layer into a shape that corresponds to the corresponding layer by using a laser cutting device, so that the spongy materials chosen for each layer forms a spongy piece after cutting; forming each padding by stacking up spongy pieces of all the layers of the corresponding padding; Step 2: choosing several paddings being made; adhering the several paddings being chosen with fabric pieces (3, 4) by heat press using a heat press mold and heat press formation devices, thereby forming the protective pad for sportswear; wherein before heat press, laying a first fabric piece on the heat press mold which contains cavities for accommodating the paddings manufactured in step 1, and then placing the paddings into the cavities; and after that, laying a second fabric piece over the paddings; applying glues between the first fabric piece, the second fabric piece and the paddings; finally, adhering the first fabric piece, the second fabric piece and the paddings by heat press using the heat press formation devices, thereby forming the protective pad for sportswear; and further comprising a step of configuring peripheries of each padding into stepped portions; wherein the plurality of separate paddings forming the protective pad are arranged according to a predetermined positional arrangement. Step 1: using spongy materials to make the paddings, comprising the following steps: deciding a thickness of each layer of each padding; choosing the spongy materials for each layer, wherein the spongy materials chosen for each layer have a thickness corresponding to the thickness decided for the corresponding layer; cutting the spongy materials chosen for each layer into a shape that corresponds to the corresponding layer by using a laser cutting device, so that the spongy materials chosen for each layer forms a spongy piece after cutting; forming each padding by stacking up spongy pieces of all the layers of the corresponding padding; Step 2: choosing several paddings being made; adhering the several paddings being chosen with fabric pieces (3, 4) by heat press using a heat press mold and heat press formation devices, thereby forming the protective pad for sportswear; wherein before heat press, laying a first fabric piece on the heat press mold which contains cavities for accommodating the paddings manufactured in step 1, and then placing the paddings into the cavities; and after that, laying a second fabric piece over the paddings; applying glues between the first fabric piece, the second fabric piece and the paddings; finally, adhering the first fabric piece, the second fabric piece and the paddings by heat press using the heat press formation devices, thereby forming the protective pad for sportswear; and further comprising a step of configuring peripheries of each padding into stepped portions; wherein the plurality of separate paddings forming the protective pad are arranged according to a predetermined positional arrangement.